Ocean

In samples of organic-rich black shale, scientists found evidence for oxygen depletion and hydrogen sulfide expansion in ancient seas.

Sea dragon dads and octopus moms are the extreme marine parents we need, winning photos show.

Diver Yosuke Tanaka swam with a giant squid in the Sea of Japan near Toyooka City in Hyogo Prefecture.

The formation of the Bering Land Bridge connecting Asia to North America occurred much later than experts thought.

A bunch of weird animals washed up dead across the globe in 2022. Here are our favorites.

Lots of bizarre deep sea creatures were spotted in 2022. Here are some of our favorites.

A suspected rogue wave recently crashed into a cruise ship near Antarctica killing one and injuring four others. Where did it come from?

Extremely detailed Cambrian fossils show that enigmatic skeleton tubes belonged to ancient ancestors of modern jellyfish.

Light-up fish and ancient volcanic structures are among the discoveries of a new expedition to map the remote Cocos Islands in the Indian Ocean.

Watch debris from the sea bottom fly, as octopuses hurl sand and other projectiles at their neighbors in an Australian bay.

Researchers estimate that blue whales may each consume up to 10 million pieces of microplastic every day during their main feeding season as they chow down on plastic-filled prey.

Here are the measurements for the deepest depths in each of the world's five oceans, and a look at the unique animals that live in these deep zones.

The subterranean structures could provide clues about how modern ice sheets will react to climate change.

Researchers exploring the deep sea in the Caribbean have come across a mysterious "blue goo" that they can't identify.

An astronaut recently captured a stunning image of a "sunglint" that transformed the sea surrounding two Greek islands into a swirling silver mirror.

A dead giant squid has washed up on a beach at a nature reserve in New Zealand. A group of tourists was lucky enough to see the body up close.

A megalodon tooth found suspiciously close to two fractured whale vertebrae may reflect one small whale's heroic escape from the jaws of a giant prehistoric shark.

Local news reports suggest that unusually large swarms tiny foot-biting isopods on beaches around San Diego are leading to a greater number of toes being chomped on.

Epaulette sharks can use their fins to "walk" underwater and even on dry land.

Dugongs, or sea cows, which are thought to have inspired tales of mythical mermaids, haven't been seen in Chinese waters since 2000.